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https://issues.apache.org/jira/browse/SOLR-6606?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14164002#comment-14164002
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Mark Miller commented on SOLR-6606:
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I don't think whether it is guaranteed or not really matters. Just making it
much more common is certainly a worthwhile improvement.
> In cloud mode the leader should distribute autoCommits to it's replicas
> -----------------------------------------------------------------------
>
> Key: SOLR-6606
> URL: https://issues.apache.org/jira/browse/SOLR-6606
> Project: Solr
> Issue Type: Improvement
> Reporter: Varun Thacker
> Fix For: 5.0, Trunk
>
> Attachments: SOLR-6606.patch
>
>
> Today in SolrCloud different replicas of a shard can trigger auto (hard)
> commits at different times. Although the documents which get added to the
> system remain consistent the way the segments gets formed can be different
> because of this.
> The downside of segments not getting formed in an identical fashion across
> replicas is that when a replica goes into recovery chances are that it has to
> do a full index replication from the leader. This is time consuming and we
> can possibly avoid this if the leader forwards auto (hard) commit commands to
> it's replicas and the replicas never explicitly trigger an auto (hard) commit.
> I am working on a patch. Should have it up shortly
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